Bicycle helmet



FIG. 1 is a perspective view of a bicycle helmet showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a top view thereof. 

CLAIM We claim the ornamental design for a bicycle helmet, as shown and described. 